/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * This is the integration file for JavaScript.
 *
 * It defines the FCKeditor class that can be used to create editor
 * instances in a HTML page in the client side. For server side
 * operations, use the specific integration system.
 */

// FCKeditor Class
var FCKeditor = function( instanceName, width, height, toolbarSet, value )
{
    // Properties
    this.InstanceName    = instanceName ;
    this.Width            = width            || '100%' ;
    this.Height            = height        || '200' ;
    this.ToolbarSet        = toolbarSet    || 'Default' ;
    this.Value            = value            || '' ;
    this.BasePath        = FCKeditor.BasePath ;
    this.CheckBrowser    = true ;
    this.DisplayErrors    = true ;

    this.Config            = new Object() ;

    // Events
    this.OnError        = null ;    // function( source, errorNumber, errorDescription )
}

/**
 * This is the default BasePath used by all editor instances.
 */
FCKeditor.BasePath = '/fckeditor/' ;

/**
 * The minimum height used when replacing textareas.
 */
FCKeditor.MinHeight = 200 ;

/**
 * The minimum width used when replacing textareas.
 */
FCKeditor.MinWidth = 750 ;

FCKeditor.prototype.Version            = '2.6.4.1' ;
FCKeditor.prototype.VersionBuild    = '23187' ;

FCKeditor.prototype.Create = function()
{
    document.write( this.CreateHtml() ) ;
}

FCKeditor.prototype.CreateHtml = function()
{
    // Check for errors
    if ( !this.InstanceName || this.InstanceName.length == 0 )
    {
        this._ThrowError( 701, 'You must specify an instance name.' ) ;
        return '' ;
    }

    var sHtml = '' ;

    if ( !this.CheckBrowser || this._IsCompatibleBrowser() )
    {
        sHtml += '<input type="hidden" id="' + this.InstanceName + '" name="' + this.InstanceName + '" value="' + this._HTMLEncode( this.Value ) + '" style="display:none" />' ;
        sHtml += this._GetConfigHtml() ;
        sHtml += this._GetIFrameHtml() ;
    }
    else
    {
        var sWidth  = this.Width.toString().indexOf('%')  > 0 ? this.Width  : this.Width  + 'px' ;
        var sHeight = this.Height.toString().indexOf('%') > 0 ? this.Height : this.Height + 'px' ;

        sHtml += '<textarea name="' + this.InstanceName +
            '" rows="4" cols="40" style="width:' + sWidth +
            ';height:' + sHeight ;

        if ( this.TabIndex )
            sHtml += '" tabindex="' + this.TabIndex ;

        sHtml += '">' +
            this._HTMLEncode( this.Value ) +
            '<\/textarea>' ;
    }

    return sHtml ;
}

FCKeditor.prototype.ReplaceTextarea = function()
{
    if ( document.getElementById( this.InstanceName + '___Frame' ) )
        return ;
    if ( !this.CheckBrowser || this._IsCompatibleBrowser() )
    {
        // We must check the elements firstly using the Id and then the name.
        var oTextarea = document.getElementById( this.InstanceName ) ;
        var colElementsByName = document.getElementsByName( this.InstanceName ) ;
        var i = 0;
        while ( oTextarea || i == 0 )
        {
            if ( oTextarea && oTextarea.tagName.toLowerCase() == 'textarea' )
                break ;
            oTextarea = colElementsByName[i++] ;
        }

        if ( !oTextarea )
        {
            alert( 'Error: The TEXTAREA with id or name set to "' + this.InstanceName + '" was not found' ) ;
            return ;
        }

        oTextarea.style.display = 'none' ;

        if ( oTextarea.tabIndex )
            this.TabIndex = oTextarea.tabIndex ;

        this._InsertHtmlBefore( this._GetConfigHtml(), oTextarea ) ;
        this._InsertHtmlBefore( this._GetIFrameHtml(), oTextarea ) ;
    }
}

FCKeditor.prototype._InsertHtmlBefore = function( html, element )
{
    if ( element.insertAdjacentHTML )    // IE
        element.insertAdjacentHTML( 'beforeBegin', html ) ;
    else                                // Gecko
    {
        var oRange = document.createRange() ;
        oRange.setStartBefore( element ) ;
        var oFragment = oRange.createContextualFragment( html );
        element.parentNode.insertBefore( oFragment, element ) ;
    }
}

FCKeditor.prototype._GetConfigHtml = function()
{
    var sConfig = '' ;
    for ( var o in this.Config )
    {
        if ( sConfig.length > 0 ) sConfig += '&amp;' ;
        sConfig += encodeURIComponent( o ) + '=' + encodeURIComponent( this.Config[o] ) ;
    }

    return '<input type="hidden" id="' + this.InstanceName + '___Config" value="' + sConfig + '" style="display:none" />' ;
}

FCKeditor.prototype._GetIFrameHtml = function()
{
    var sFile = 'fckeditor.html' ;

    try
    {
        if ( (/fcksource=true/i).test( window.top.location.search ) )
            sFile = 'fckeditor.original.html' ;
    }
    catch (e) { /* Ignore it. Much probably we are inside a FRAME where the "top" is in another domain (security error). */ }

    var sLink = this.BasePath + 'editor/' + sFile + '?InstanceName=' + encodeURIComponent( this.InstanceName ) ;
    if (this.ToolbarSet)
        sLink += '&amp;Toolbar=' + this.ToolbarSet ;

    var html = '<iframe id="' + this.InstanceName +
        '___Frame" src="' + sLink +
        '" width="' + this.Width +
        '" height="' + this.Height ;

    if ( this.TabIndex )
        html += '" tabindex="' + this.TabIndex ;

    html += '" frameborder="0" scrolling="no"></iframe>' ;

    return html ;
}

FCKeditor.prototype._IsCompatibleBrowser = function()
{
    return FCKeditor_IsCompatibleBrowser() ;
}

FCKeditor.prototype._ThrowError = function( errorNumber, errorDescription )
{
    this.ErrorNumber        = errorNumber ;
    this.ErrorDescription    = errorDescription ;

    if ( this.DisplayErrors )
    {
        document.write( '<div style="COLOR: #ff0000">' ) ;
        document.write( '[ FCKeditor Error ' + this.ErrorNumber + ': ' + this.ErrorDescription + ' ]' ) ;
        document.write( '</div>' ) ;
    }

    if ( typeof( this.OnError ) == 'function' )
        this.OnError( this, errorNumber, errorDescription ) ;
}

FCKeditor.prototype._HTMLEncode = function( text )
{
    if ( typeof( text ) != "string" )
        text = text.toString() ;

    text = text.replace(
        /&/g, "&amp;").replace(
        /"/g, "&quot;").replace(
        /</g, "&lt;").replace(
        />/g, "&gt;") ;

    return text ;
}

;(function()
{
    var textareaToEditor = function( textarea )
    {
        var editor = new FCKeditor( textarea.name ) ;

        editor.Width = Math.max( textarea.offsetWidth, FCKeditor.MinWidth ) ;
        editor.Height = Math.max( textarea.offsetHeight, FCKeditor.MinHeight ) ;

        return editor ;
    }

    /**
     * Replace all <textarea> elements available in the document with FCKeditor
     * instances.
     *
     *    // Replace all <textarea> elements in the page.
     *    FCKeditor.ReplaceAllTextareas() ;
     *
     *    // Replace all <textarea class="myClassName"> elements in the page.
     *    FCKeditor.ReplaceAllTextareas( 'myClassName' ) ;
     *
     *    // Selectively replace <textarea> elements, based on custom assertions.
     *    FCKeditor.ReplaceAllTextareas( function( textarea, editor )
     *        {
     *            // Custom code to evaluate the replace, returning false if it
     *            // must not be done.
     *            // It also passes the "editor" parameter, so the developer can
     *            // customize the instance.
     *        } ) ;
     */
    FCKeditor.ReplaceAllTextareas = function()
    {
        var textareas = document.getElementsByTagName( 'textarea' ) ;

        for ( var i = 0 ; i < textareas.length ; i++ )
        {
            var editor = null ;
            var textarea = textareas[i] ;
            var name = textarea.name ;

            // The "name" attribute must exist.
            if ( !name || name.length == 0 )
                continue ;

            if ( typeof arguments[0] == 'string' )
            {
                // The textarea class name could be passed as the function
                // parameter.

                var classRegex = new RegExp( '(?:^| )' + arguments[0] + '(?:$| )' ) ;

                if ( !classRegex.test( textarea.className ) )
                    continue ;
            }
            else if ( typeof arguments[0] == 'function' )
            {
                // An assertion function could be passed as the function parameter.
                // It must explicitly return "false" to ignore a specific <textarea>.
                editor = textareaToEditor( textarea ) ;
                if ( arguments[0]( textarea, editor ) === false )
                    continue ;
            }

            if ( !editor )
                editor = textareaToEditor( textarea ) ;

            editor.ReplaceTextarea() ;
        }
    }
})() ;

function FCKeditor_IsCompatibleBrowser()
{
    var sAgent = navigator.userAgent.toLowerCase() ;

    // Internet Explorer 5.5+
    if ( /*@cc_on!@*/false && sAgent.indexOf("mac") == -1 )
    {
        var sBrowserVersion = navigator.appVersion.match(/MSIE (.\..)/)[1] ;
        return ( sBrowserVersion >= 5.5 ) ;
    }

    // Gecko (Opera 9 tries to behave like Gecko at this point).
    if ( navigator.product == "Gecko" && navigator.productSub >= 20030210 && !( typeof(opera) == 'object' && opera.postError ) )
        return true ;

    // Opera 9.50+
    if ( window.opera && window.opera.version && parseFloat( window.opera.version() ) >= 9.5 )
        return true ;

    // Adobe AIR
    // Checked before Safari because AIR have the WebKit rich text editor
    // features from Safari 3.0.4, but the version reported is 420.
    if ( sAgent.indexOf( ' adobeair/' ) != -1 )
        return ( sAgent.match( / adobeair\/(\d+)/ )[1] >= 1 ) ;    // Build must be at least v1

    // Safari 3+
    if ( sAgent.indexOf( ' applewebkit/' ) != -1 )
        return ( sAgent.match( / applewebkit\/(\d+)/ )[1] >= 522 ) ;    // Build must be at least 522 (v3)

    return false ;
}
